<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        #div1{
            /* 盒阴影 */
            width: 395px;
            height: 391px;
            margin: 0;
            box-shadow: 5px 5px 10px;

        }
    </style>
</head>
<body>
    <div id="div1">
        <img src="img/boy.png" alt="404">
    </div>
</body>
</html>